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RF Directional Coupler

Introduction

A directional coupler is a four-port network that provides directional coupling of RF power between two ports. It is commonly used in many fields of communications and sensor systems, including cable television (CATV), public address systems, cellular telephone systems, aviation and other wireless communication networks. It is used to measure the power level of a signal or to couple a signal from one leg of a system to another leg.

XC3500M-20S Application Field and Working Principle

The XC3500M-20S is a high-accuracy, wide-frequency-range directional coupler that offers reliable operation over a wide range of frequencies. It is designed to provide an effective way to measure the power level of a signal, or to couple power from a primary signal on one leg of a system to a secondary, or monitor, point on another leg.

The XC3500M-20S is a high isolation, wide-frequency-range directional coupler with low insertion loss and VSWR. It is ideal for measuring and monitoring signal power levels at various points in a system. It can also be used to couple a signal between two points in a system, to provide protection from high-power levels at the monitored point, or to provide an impedance match for transmission line exchanges.

The XC3500M-20S offers an omnidirectional view capability, allowing it to operate over a full 180-degree mode. Its directional properties are designed to provide consistent coupling performance over a wide range of frequencies while providing an accurate power level indicator. The coupling ration of the XC3500M-20S is adjustable from 0-20 dB, allowing for accurate adjustment of the signal level.

The XC3500M-20S is well suited to a variety of applications. It can be used in radar tracking systems, satellite communications, or as part of a wide range of test and measurement systems. Additionally, the XC3500M-20S can be used in broadcast systems for transmitting waves in a variety of systems, as well as for shielding, or bridging systems for protecting sensitive CMOS or MEMS components from disruption.

The XC3500M-20S works by creating a “magnetic coupler” between two points. It uses an internal magnetic field created by a set of coils, and then converts this into electrical current. This current is then used to couple RF power between the two points. The XC3500M-20S is designed to have a wide bandwidth, with accurate measurements of power levels over a wide frequency range.

Conclusion

The XC3500M-20S is a wide-frequency-range directional coupler that is well suited for a variety of communications and sensor systems. It offers reliable operation over a wide frequency range and provides an effective way to measure the power level of a signal, or to couple a signal from one leg of a system to another leg. Its directional properties are designed to provide consistent coupling performance over a wide range of frequencies, while its adjustable coupling ratio, omnidirectional view capability, and wide bandwidth make it suitable for a variety of communications applications.

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